/*
 * MIT License
 *
 * Copyright (c) 2021-2099 Oscura (xingshuang) <xingshuang_cool@163.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.github.xingshuangs.iot.protocol.rtsp.model.sdp;


import com.github.xingshuangs.iot.protocol.rtsp.model.sdp.attribute.*;
import com.github.xingshuangs.iot.utils.StringSpUtil;
import lombok.Data;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.github.xingshuangs.iot.protocol.rtsp.constant.RtspCommonKey.*;

/**
 * SDP media.
 * (媒体描述)
 *
 * @author xingshuang
 */
@Data
public class RtspSdpMedia {

    /**
     * Media description.
     * (媒体描述)
     */
    private RtspSdpMediaDesc mediaDesc;

    /**
     * Connection.
     * 连接信息(可选)
     */
    private RtspSdpConnection connection;

    /**
     * Bandwidth.
     * 带宽(可选)
     */
    private RtspSdpBandwidth bandwidth;

    /**
     * Encrypt key.
     * 加密秘钥(可选)
     */
    private RtspSdpEncryptKey encryptKey;

    /**
     * Attributes.
     * 附加信息(可选)
     */
    private Map<String, String> attributes = new HashMap<>();

    public static RtspSdpMedia fromString(String src) {
        if (src == null || src.equals("")) {
            throw new IllegalArgumentException("media, src is null or empty");
        }
        RtspSdpMedia media = new RtspSdpMedia();
        List<String> list = StringSpUtil.splitOneStepByLine(src, CRLF);
        for (String item : list) {
            int i = item.indexOf(EQUAL);
            if (i == -1) {
                continue;
            }
            String key = item.substring(0, i).trim();
            String value = item.substring(i + 1).trim();
            switch (key) {
                case "m":
                    media.mediaDesc = RtspSdpMediaDesc.fromString(value);
                    break;
                case "c":
                    media.connection = RtspSdpConnection.fromString(value);
                    break;
                case "b":
                    media.bandwidth = RtspSdpBandwidth.fromString(value);
                    break;
                case "a":
                    int index = value.indexOf(COLON);
                    if (index == -1) {
                        media.attributes.put(value, "");
                    } else {
                        media.attributes.put(value.substring(0, index), value.substring(index + 1));
                    }
                    break;
                default:
                    break;
            }
        }
        return media;
    }

    public RtspSdpMediaAttrControl getAttributeControl() {
        String value = this.attributes.get("control");
        if (value == null) {
            return null;
        }
        return RtspSdpMediaAttrControl.fromString(value);
    }

    public RtspSdpMediaAttrDimension getAttributeDimension() {
        String value = this.attributes.get("x-dimensions");
        if (value == null) {
            return null;
        }
        return RtspSdpMediaAttrDimension.fromString(value);
    }

    public RtspSdpMediaAttrFmtp getAttributeFmtp() {
        String value = this.attributes.get("fmtp");
        if (value == null) {
            return null;
        }
        return RtspSdpMediaAttrFmtp.fromString(value);
    }

    public RtspSdpMediaAttrRtpMap getAttributeRtpMap() {
        String value = this.attributes.get("rtpmap");
        if (value == null) {
            return null;
        }
        return RtspSdpMediaAttrRtpMap.fromString(value);
    }

    public RtspSdpMediaAttrHeader getAttributeHeader() {
        String value = this.attributes.get("Media_header");
        if (value == null) {
            return null;
        }
        return RtspSdpMediaAttrHeader.fromString(value);
    }
}
